Shell Programming and Scripting

Hi,

I have a question of comparing to files and output
the result third file where file1 is the mainfile containing processed dir data
and 2nd file grep´s dir´s data again (could be newer dirs comparing file1<file2)
now i wanna make shure that output in file3 only contains newer dirs

hx for help

Please posting data samples for input and the desired output.
Please use code tags when posting data/code samples.

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